"The tea is in the room."
Translation:차는 방에 있습니다.
I read here (https://langintro.com/kintro/grammar/spev2.htm) that the subject/topic particles are not needed for "exist" sentences. So for this specific sentence it would've been: 차 방에 있습니다. I don't know if it's a good source tho, but the way they expalined this topic is very informative